Sora Triple chainring to double chainring
#1
Newbie
Thread Starter
Sora Triple chainring to double chainring
I have a sora 2x9 setup and want to replace original 300ex chainrings and bottom bracket as they are worn out. I was gifted a triple sora chainring instead of the double I need. Can I simply remove smallest chainring and then install the crankset as a double? It looks like that smaller or most inner ring comes off. Will this affect chain line by installing it as a double when it was packaged a triple. Thank you
#2
SE Wis
Join Date: Apr 2005
Location: Milwaukee, WI
Posts: 10,516
Bikes: '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400, 2013 Novara Randonee, 1990 Trek 970
Mentioned: 40 Post(s)
Tagged: 0 Thread(s)
Quoted: 2747 Post(s)
Liked 3,401 Times
in
2,058 Posts
Not enough to worry about
#3
Newbie
Thread Starter
So safe to remove smallest ring and install it? Didn’t want to void return if it didn’t work. Thanks!
#4
Newbie
Thread Starter
#5
Senior Member
Join Date: Jul 2015
Location: reno, nv
Posts: 2,301
Bikes: yes, i have one
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 1138 Post(s)
Liked 1,182 Times
in
687 Posts
if you have the clearance for the small ring you probably could just leave it on. you just won't be shifting to it. not sure about the CL question though. won't the big ring be further out? if your FD can reach it then maybe ok.
a great question to post in the bike mechan forum to be sure.
a great question to post in the bike mechan forum to be sure.
#6
I'm good to go!
Join Date: Jul 2017
Location: Mississippi
Posts: 14,992
Bikes: Tarmac Disc Comp Di2 - 2020
Mentioned: 51 Post(s)
Tagged: 0 Thread(s)
Quoted: 6196 Post(s)
Liked 4,810 Times
in
3,318 Posts
If you were gifted the crankset, then is it newly purchased? If so, just ask the person that gifted it to you whom they got it from so you can see if it can be exchanged.
If it's just a spare that someone had and gifted to you, then try it and see whether it works for you or not. However the chain line going to the biggest ring will be off a few millimeters. You'll know if that's a problem if you have poor shifting to the larger rear sprockets. You also might find your front derailleur does not have enough high limit adjustment to allow you to get into the big ring. But that's just more me wondering. I've never tried to use a 3x crank with a 2x FD.
As another mentioned, just leave the small ring on the crank. It'll make some others scratch their heads. And it won't be taking up shelf space in perpetuity.
If it's just a spare that someone had and gifted to you, then try it and see whether it works for you or not. However the chain line going to the biggest ring will be off a few millimeters. You'll know if that's a problem if you have poor shifting to the larger rear sprockets. You also might find your front derailleur does not have enough high limit adjustment to allow you to get into the big ring. But that's just more me wondering. I've never tried to use a 3x crank with a 2x FD.
As another mentioned, just leave the small ring on the crank. It'll make some others scratch their heads. And it won't be taking up shelf space in perpetuity.
#7
Senior Member
Join Date: May 2022
Location: USA - Southwest PA
Posts: 3,098
Bikes: Cannondale - Gary Fisher - Giant - Litespeed - Schwinn Paramount - Schwinn (lugged steel) - Trek OCLV
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 1400 Post(s)
Liked 1,885 Times
in
1,084 Posts
years - decades - ago a number of guys in our road riding group ran MTB cranksets with the small ring removed on their road bikes
they paired them with a cassette with a 11t small cog which were just becoming available (Action Tec was one source until the big companies began to offer 11t cog)
this was before the availability of the current / popular semi-compact and compact cranksets you often see on road and gravel bikes
can’t recall the front derailleurs they used - but their bikes shifted well … no issues
one example pictured above - Shimano 563 LX crank with 44 / 29 chainrings (94 mm bcd)
Last edited by t2p; 02-07-24 at 09:59 AM.
#8
Senior Member
A triple will have a slightly wider 'Q' factor, but will still work as a double if you take off the inner ring. You'll just have to adjust your derailleur to match. (The derailleur will need to move out a bit further.)